CN215886828U - Under-roller isolation protection device for float glass transition roller table - Google Patents

Abstract

The utility model discloses a roller lower isolation protection device for a float glass transition roller table, which comprises a mounting seat fixedly arranged below a transition roller set of the float glass transition roller table, wherein a lower air curtain exhaust nozzle is fixedly arranged on the mounting seat, and an exhaust port of the lower air curtain exhaust nozzle upwards faces to a gap area between a tin bath outlet and the transition roller set and/or a gap area between the transition roller set and an annealing roller in an annealing kiln; the first lower anti-oxidation gas supply device is communicated with the lower gas curtain exhaust nozzle and is used for supplying anti-oxidation gas. The scheme can isolate and protect the lower roller of the transition roller table, thereby preventing external gas from entering a tin bath from the lower roller area of the transition roller table, reducing the probability of adhesive on the lower surface of the glass belt and avoiding roller marks on the lower surface of the glass belt.

Description

Under-roller isolation protection device for float glass transition roller table

Technical Field

The utility model relates to the technical field of glass production, in particular to a roller lower isolation protection device for a float glass transition roller table.

Background

Float glass manufacturing plants typically include a tin bath, a transition roll table, and an annealing lehr arranged in sequence. In the manufacturing process of float glass, molten glass flows into a tin bath, floats on the molten tin to move and is gradually cooled to form a glass ribbon, the glass ribbon enters an annealing kiln through a transition roller table from an outlet of the tin bath, an annealing process is carried out in the annealing kiln, and finally the glass ribbon is cut into glass plates with specified sizes.

Compared with other forming methods, the forming method of the float glass has the advantages that: the method is suitable for efficiently manufacturing high-quality plate glass, such as no ribs, uniform thickness, flat upper and lower surfaces and parallel to each other; the scale of the production line is not limited by a forming method, and the energy consumption of unit products is low; the utilization rate of the finished product is high; scientific management is easy, full-line mechanization and automation are realized, and the labor productivity is high; the continuous operation period can be as long as several years, which is beneficial to stable production; can provide suitable conditions for producing some new varieties on line, such as electro-float reflecting glass, film-coated glass during annealing, cold end surface treatment and the like.

In the ultra-thin electronic glass float production line, a transition roller table is the most central device for connecting a tin bath and an annealing furnace, the glass belt formed in the tin bath is drawn to an annealing kiln through a transition roller of a transition roller table for annealing, a bead brick and a top cover are arranged at the position where the tin bath is matched with the transition roller table, in the actual production process, if the temperature of the transition roller table space is too high and the residual oxygen amount of the transition roller table space is too high, when the glass ribbon passes through the transition roller table space, tin defects of the glass ribbon are easy to generate, meanwhile, oxygen enters the tin bath and reacts with tin liquid in the tin bath, thereby causing adhesion defects to occur on the glass ribbon as it passes through the tin bath and, in addition, as the glass ribbon passes from the tin bath to the transition roll stand, since the surface of the glass ribbon is in a relatively soft state, when the glass ribbon contacts the transition roller table, roll mark defects are easily generated on the contact surface between the lower surface of the glass ribbon and the transition roller table. In order to reduce the tin defect and the roll mark defect of the glass ribbon caused by the reasons in the prior art, a plurality of methods are adopted, such as arranging a baffle curtain or changing an outlet structure of a tin bath, and the like, but in the practical application process, the baffle sealing effect is found to be limited, more residual oxygen gas still enters the tin bath, the space environment of a transition roller table and the tin bath is influenced, and the tin defect of the glass ribbon is generated.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the technical problems to be solved by the utility model are as follows: how to provide an under-roller isolation protection device for a float glass transition roller table, which can isolate and protect under a roller of the transition roller table, can further reduce the influence of residual oxygen gas at a kiln opening of an annealing kiln on a tin bath, and simultaneously reduce tin defects and roll mark defects on the lower surface of a glass belt.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a roller lower isolation protection device for a float glass transition roller table comprises a mounting seat fixedly mounted below a transition roller set of the float glass transition roller table, wherein a lower air curtain exhaust nozzle is fixedly mounted on the mounting seat, and an exhaust port of the lower air curtain exhaust nozzle faces upwards to a gap area between a tin bath outlet and the transition roller set and/or a gap area between the transition roller set and an annealing roller in an annealing kiln; the first lower anti-oxidation gas supply device is communicated with the lower gas curtain exhaust nozzle and is used for supplying anti-oxidation gas.

When the under-roller isolation protection device is used, the lower anti-oxidation gas supply device is used for supplying anti-oxidation gas to the lower gas curtain exhaust nozzle, so that the anti-oxidation gas is sprayed upwards from the lower gas curtain exhaust nozzle and towards the lower surface of a glass ribbon in a gap area between a tin bath outlet and a transition roller set and/or a gap area between the transition roller set and an annealing roller in an annealing kiln, and an anti-oxidation gas curtain (the anti-oxidation gas curtain is formed by spraying the anti-oxidation gas) is formed in the gap area between the tin bath outlet and the transition roller set and/or the gap area between the transition roller set and the annealing roller in the annealing kiln. On one hand, the anti-oxidation gas curtain can form blocking and isolating effects on a gap area between the tin bath outlet and the transition roller set and/or a gap area between the transition roller set and the annealing roller in the annealing kiln, so that gas flowing from the annealing kiln can not enter the tin bath from a roller lower area of the transition roller table, and the purpose of preventing external gas from entering the tin bath is achieved; on the other hand, the anti-oxidation gas curtain formed by spraying the lower gas curtain exhaust nozzle upwards and towards the lower surface of the glass ribbon can form positive pressure in the area below the roller of the transition roller table, and external gas cannot further enter the tin bath through the positive pressure environment under the action of the positive pressure, so that the external oxygen is prevented from entering the tin bath to react with molten tin, and the probability of adhesive on the lower surface of the glass ribbon is reduced; moreover, the lower surface of the glass ribbon coming out of the tin bath can be cooled by the anti-oxidation gas curtain formed by the upward ejection of the lower gas curtain exhaust nozzle and the ejection of the lower gas curtain exhaust nozzle towards the lower surface of the glass ribbon, so that the lower surface of the glass ribbon is in a relatively hardened state when the glass ribbon moves on the ribbon transition roller set, and the roller printing defect on the lower surface of the glass ribbon is avoided; meanwhile, the anti-oxidation air curtain can act on the glass belt and provide upward supporting force for the glass belt, so that the interaction force of the glass belt and the transition roller set is reduced, and the roller mark defect is avoided. Solution (II)

When the scheme is used specifically, a lower air curtain device can be arranged below a gap region between the tin bath outlet and the transition roller set or below a gap region between the transition roller set and an annealing roller in an annealing kiln; and a lower air curtain device can be arranged below a gap area between the tin bath outlet and the transition roller group and below a gap area between the transition roller group and an annealing roller in the annealing kiln.

To sum up, this scheme comes to carry out isolation protection to the roller lower region of transition roller platform through the anti-oxidation gas curtain that lower gas curtain air discharge nozzle upwards spout formed to prevent that the external gas from getting into the molten tin bath, reducing the probability that the adhesive appears in the glass belt lower surface from the roller lower region of transition roller platform, still avoid defects such as roll marks appearing in the glass belt lower surface through the cooling effect of anti-oxidation gas to the glass belt simultaneously.

Preferably, the exhaust port of the lower air curtain exhaust nozzle is in a flat belt shape, and the belt-shaped extension direction of the flat belt-shaped exhaust port is parallel to the extension direction of a gap area between the tin bath outlet and the transition roller group and/or a gap area between the transition roller group and an annealing roller in the annealing kiln; or the exhaust port of the lower air curtain exhaust nozzle is a plurality of lower exhaust holes which are arranged in parallel, and the arrangement extending direction of the lower exhaust holes is parallel to the extending direction of a gap area between the tin bath outlet and the transition roller group and/or a gap area between the transition roller group and an annealing roller in the annealing kiln.

Parallel means that the strip-like direction of extent of the flat strip-like outlet opening is parallel or substantially parallel to the direction of extent of the gap region between the tin bath outlet and the set of transition rollers.

Thus, when the exhaust port of the lower air curtain exhaust nozzle adopts the flat belt-shaped structural form, the anti-oxidation gas exhausted from the lower air curtain exhaust nozzle can be uniformly exhausted from the flat belt-shaped exhaust port, and simultaneously, since the strip-shaped extension direction of the flat strip-shaped exhaust port is parallel to the extension direction of the gap area between the tin bath outlet and the transition roller group and/or the gap area between the transition roller group and the annealing roller in the annealing kiln, therefore, an anti-oxidation gas curtain formed by the anti-oxidation gas discharged by the flat belt-shaped exhaust port is parallel to the extending direction of a gap area between the tin bath outlet and the transition roller group and/or a gap area between the transition roller group and an annealing roller in the annealing kiln, thereby leading the anti-oxidation gas curtain to better block the external gas and further ensuring the gas blocking function of the outlet position of the tin bath below the glass strip.

When the exhaust port of the lower air curtain exhaust nozzle adopts the structure of the lower exhaust holes, the anti-oxidation gas is uniformly discharged upwards from the plurality of lower exhaust holes to form an upward anti-oxidation air curtain, the arrangement of the plurality of lower exhaust holes can reduce the waste of the anti-oxidation gas on the premise of ensuring the formation of the anti-oxidation air curtain, meanwhile, the arrangement extending direction of the lower exhaust holes is parallel to the extending direction of a gap area between the tin bath outlet and the transition roller group and/or a gap area between the transition roller group and an annealing roller in the annealing kiln, so that the anti-oxidation gas curtain formed by the anti-oxidation gas exhausted by the first lower exhaust holes is parallel to the extending direction of the gap area between the tin bath outlet and the transition roller set and/or the gap area between the transition roller set and the annealing roller in the annealing kiln, thereby leading the anti-oxidation gas curtain to better block the external gas and further ensuring the gas blocking function of the outlet position of the tin bath below the glass strip.

Preferably, the blowing direction of the upward blowing anti-oxidation air curtain of the exhaust port of the lower air curtain exhaust nozzle inclines towards the direction of the transition roller set, and the inclined direction forms an included angle of 1-30 degrees relative to the vertical plane.

Like this, the jetting direction of the gas vent of lower air curtain air discharge nozzle upwards jetting anti-oxidation air curtain can make more anti-oxidation gas toward the direction slope of transition roller set direction slope to better form the malleation in transition roller set region, further reduce the probability that outside gas enters into the molten tin bath through the malleation environment of transition roller set, and then reach the probability that reduces glass lower surface because the molten tin in the molten tin bath oxidation leads to the appearance adhesion thing.

Meanwhile, the blowing direction of the upward blowing anti-oxidation air curtain of the exhaust port of the lower air curtain exhaust nozzle forms an included angle of 1-30 degrees relative to the vertical plane towards the inclined direction of the transition roller set direction, and positive pressure can be better formed in the transition roller set area.

Preferably, a lower gas heating device and/or a lower gas flow control valve are arranged on a communication channel between the lower anti-oxidation gas supply device and the lower gas curtain exhaust nozzle.

Therefore, by arranging the lower gas heating device, the temperature of the anti-oxidation gas blown out by the lower gas heating device can be more accurately controlled, so that the temperature for cooling the lower surface of the glass strip is more accurately controlled, and the aim of avoiding roll marks is fulfilled.

Meanwhile, the lower gas flow control valve is used for more accurately controlling the flow of the sprayed anti-oxidation gas, and the cooling temperature of the lower surface of the glass strip can be more accurately controlled by cooperatively controlling the flow and the temperature of the anti-oxidation gas, so that the hardening effect of the lower surface of the glass strip is ensured, and roll marks are avoided.

Preferably, the glass ribbon annealing furnace further comprises a first lower partition plate arranged in a gap area between the transition roller group and the annealing roller in the annealing furnace, and the first lower partition plate is arranged opposite to the glass ribbon at a distance.

Like this, through setting up first partition panel once to with first partition panel and the relative setting in glass area, simultaneously, during the in-service use, can set up first partition panel to the structure of liftable, make the last border that reduces first partition panel as far as possible under the prerequisite of guaranteeing that the glass area passes through smoothly with the distance in corresponding position glass area, can further realize the effect of blocking to the gas that comes from annealing kiln department from this.

Preferably, a second lower partition plate is arranged below each transition roller in the transition roller group, so that the lower part of the transition roller group is divided into a plurality of lower partition areas.

Like this, through setting up partition plate under the second, can be so that transition roller set is divided into a plurality of lower partition regions to make every lower partition region become a relatively independent space, further improve transition roller set below to the sealed effect of blocking of outside gas from this. Simultaneously, during the in-service use, can set up the partition plate into the structure of liftable under the second to the height of partition plate is controlled under the second according to the in-service use condition.

Preferably, a lower air outlet nozzle for outputting anti-oxidation gas is further arranged in each lower partition area.

Thus, the lower air exhaust nozzles output anti-oxidation gas, on one hand, the formed anti-oxidation gas curtain can form positive pressure in the lower space of the transition roller set, and thus a protective environment for preventing tin defects is established; meanwhile, the protective film can be formed on the lower surface of the glass plate by controlling the components of the anti-oxidation gas, so that the lower surface of the glass is protected from being scratched easily.

Preferably, a lower heating device is further arranged in each lower partition area.

Therefore, the lower heating device can be used for more accurately controlling the temperature of different areas of the lower surface of the glass belt passing through the transition roller group, so that the requirements of process production are better met.

Preferably, a temperature detection device for detecting the temperature of the lower region of the transition roller group is further provided below the gap between the transition roller group and the annealing rollers of the annealing kiln.

Thus, the temperature detection device is used for detecting the temperature of the lower area of the transition roller table so as to better realize the temperature control under the roller of the transition roller table.

Preferably, the set of transition rolls includes a first transition roll, a second transition roll and a third transition roll which are arranged along the moving direction of the glass ribbon and can be independently lifted and/or controlled in rotation speed.

In this way, each transition roller can be independently lifted and/or controlled in rotating speed, so that the production requirement on the process is facilitated.

Drawings

FIG. 1 is a schematic view of the under roll isolation protection device of the present invention for a float glass transition roll stand;

FIG. 2 is a top view of the under roll insulation protection for a float glass transition roll stand of the present invention.

Description of reference numerals: the device comprises a glass ribbon 1, a lower roller isolation protection device 2, a first transition roller 201, a second transition roller 202, a third transition roller 203, an annealing roller 204, a temperature detection device 205, a first lower partition plate 206, a second lower partition plate 207, a first lower gas curtain exhaust nozzle 208, a second lower gas curtain exhaust nozzle 209, a first gas mixing device 210, a first lower gas flow control valve 211, a third lower gas flow control valve 212, a gas heating device 213, a second gas mixing device 214, a second lower gas flow control valve 215, a lower heating device 216, a first lower exhaust hole 217, a second lower exhaust hole 218, a mounting seat 219, a lower exhaust hole 220, a tin bath 3, a tin bath outlet 31 and an annealing kiln 4.

Detailed Description

The utility model will be further explained with reference to the drawings and the embodiments.

As shown in FIG. 1, a float glass manufacturing apparatus generally includes a tin bath 3, a transition roll stand, and an annealing lehr 4 arranged in this order. In the manufacturing process of float glass, molten glass flows into a tin bath 3, floats on the molten tin to move and is gradually cooled to form a glass ribbon 1, the glass ribbon 1 enters an annealing kiln 4 from a tin bath outlet 31 through a transition roller table, annealing is carried out in the annealing kiln 4, and finally the glass ribbon 1 is cut into glass plates with specified sizes.

The following is described in detail in a manner that lower air curtain devices are provided below the gap region between the tin bath outlet 31 and the transition roller group and below the gap region between the transition roller group and the annealing rollers in the annealing lehr 4 (a first lower air curtain device is provided below the gap region between the tin bath outlet 31 and the transition roller group, and a second lower air curtain device is provided below the gap region between the transition roller group and the annealing rollers in the annealing lehr 4); of course, in the specific implementation process, the lower air curtain can be arranged only below the gap area between the tin bath outlet 31 and the transition roller group or below the gap area between the transition roller group and the annealing rollers in the annealing kiln 4.

In this embodiment, the under-roller isolation protection device for a float glass transition roller table comprises a mounting seat 219 for being fixedly mounted below a transition roller set of the float glass transition roller table, wherein a first lower air curtain exhaust nozzle 208 is fixedly mounted on the mounting seat 219, and an exhaust port of the first lower air curtain exhaust nozzle 208 faces upwards to a gap area between a tin bath outlet 31 and the transition roller set; and a first lower anti-oxidation gas supply device communicated with the first lower gas curtain exhaust nozzle 208 and used for supplying anti-oxidation gas. In this embodiment, the transition roller set includes the first transition roller 201, the second transition roller 202 and the third transition roller 203 which are sequentially arranged along the moving direction of the glass ribbon 1 and can be independently controlled to ascend and descend, and the first transition roller 201, the second transition roller 202 and the third transition roller 203 can adjust the height and/or the rotating speed according to the production needs, and the adjustment of the height and/or the rotating speed of the transition rollers belongs to the prior art, so that the detailed description is omitted in the scheme.

When the under-roller isolation protection device 2 is used, the first lower anti-oxidation gas supply device is used for supplying anti-oxidation gas to the first lower gas curtain exhaust nozzle 208, so that the anti-oxidizing gas is blown from the first lower gas curtain exhaust nozzles 208 upwardly and toward the lower surface of the glass ribbon 1 in the gap region between the tin bath outlet 31 and the set of transition rolls, and an anti-oxidation air curtain is formed in a clearance area between the tin bath outlet 31 and the transition roller set (the anti-oxidation air curtain is formed by blowing anti-oxidation gas), the anti-oxidation air curtain can realize the blocking and isolating effect on the outlet position of the tin bath 3, on one hand, the anti-oxidation air curtain can form the blocking and isolating effect on the lower part of the gap area between the tin bath outlet 31 and the transition roller set, so that the gas flowing from the annealing kiln 4 can not enter the tin bath 3 from the lower area of the transition roller table, thereby achieving the purpose of preventing the external gas from entering the tin bath 3; on the other hand, the anti-oxidation gas curtain formed by spraying the first lower gas curtain exhaust nozzle 208 upwards and towards the lower surface of the glass ribbon can form positive pressure in the area below the roller of the transition roller table, and external gas cannot further enter the tin bath 3 through the positive pressure environment under the action of the positive pressure, so that external oxygen is prevented from entering the tin bath 3 to react with molten tin, and the probability of adhesive substances on the lower surface of the glass ribbon 1 is reduced; moreover, the anti-oxidation gas curtain formed by the upward and downward spraying of the first lower gas curtain exhaust nozzles 208 towards the lower surface of the glass ribbon also cools the lower surface of the glass ribbon 1 coming out of the tin bath 3, so that the lower surface of the glass ribbon 1 is hardened at an accelerated rate, and thus when the glass ribbon 1 moves on the ribbon transition roller set, the lower surface of the glass ribbon 1 is in a relatively hardened state, and roll mark defects on the lower surface of the glass ribbon 1 are avoided. Meanwhile, the anti-oxidation air curtain can act on the glass belt and provide upward supporting force for the glass belt, so that the interaction force of the glass belt and the transition roller set is reduced, and the roller mark defect is avoided.

To sum up, this scheme is through the anti-oxidation air curtain that first air curtain air discharge nozzle 208 upwards spout formation under to the roller of transition roller platform region carry out isolation protection to prevent that the outside gas from getting into molten tin bath 3, reducing glass area 1 lower surface from the roller of transition roller platform under the probability that the adhesion thing appears, still avoid the glass area 1 lower surface defect such as roll mark to appear through anti-oxidation gas to the cooling effect of glass area 1 simultaneously.

In the present embodiment, the exhaust port of the first lower air curtain exhaust nozzle 208 is in a flat belt shape, and the belt-shaped extension direction of the flat belt-shaped exhaust port is parallel to the extension direction of the gap region between the tin bath outlet 31 and the transition roller group.

Parallel means that the strip-like direction of extent of the flat strip-like outlet opening is parallel or substantially parallel to the direction of extent of the gap region between the tin bath outlet 31 and the set of transition rollers.

In this way, the anti-oxidation gas discharged from the first lower gas curtain exhaust nozzle 208 can be uniformly discharged from the flat strip-shaped exhaust port, and meanwhile, because the strip-shaped extending direction of the flat strip-shaped exhaust port is parallel to the extending direction of the gap area between the tin bath outlet 31 and the transition roller set, the anti-oxidation gas curtain formed by the anti-oxidation gas discharged from the flat strip-shaped exhaust port is parallel to the extending direction of the gap area between the tin bath outlet 31 and the transition roller set, so that the anti-oxidation gas curtain can block the external gas at the position of the tin bath outlet 31 in the extending direction of the tin bath outlet 31, and further ensure the gas blocking effect at the position of the tin bath outlet 31 below the glass ribbon 1.

As shown in fig. 2, in the present embodiment, the exhaust ports of the first lower air curtain exhaust nozzle 208 are a plurality of first lower exhaust holes 217 arranged in parallel, and the arrangement extending direction of the plurality of first lower exhaust holes 217 is parallel to the extending direction of the gap region between the tin bath outlet 31 and the transition roller set.

Like this, through setting up a plurality of first exhaust holes 217, the even a plurality of first exhaust holes 217 from a plurality of first exhaust holes 217 upwards discharge in order to form ascending anti-oxidation gas curtain, the setting of a plurality of first exhaust holes 217 can reduce the waste of anti-oxidation gas under the prerequisite of guaranteeing anti-oxidation gas curtain to form, and simultaneously, the extending direction of arranging of a plurality of first exhaust holes 217 is on a parallel with the regional extending direction in clearance between molten tin bath export 31 and the transition roller set, make the anti-oxidation gas curtain that anti-oxidation gas that discharges through first exhaust holes 217 will also be on a parallel with the regional extending direction in clearance between molten tin bath export 31 and the transition roller set, thereby make anti-oxidation gas curtain can all carry out the blocking of outside gas to molten tin bath export 31 position in the extending direction of molten tin bath export 31, further guarantee to the gas blocking effect of molten tin bath export 31 position below glass area 1.

In this embodiment, the blowing direction of the upward blowing of the oxidation-resistant air curtain by the exhaust port of the first lower air curtain exhaust nozzle 208 is inclined toward the transition roller group direction.

Like this, the gas vent of first air curtain air discharge nozzle 208 upwards sprays the jetting direction of anti-oxidation air curtain towards the slope of transition roller set direction can make more anti-oxidation gas toward the slope of transition roller set direction to better form the malleation in transition roller set region, further reduce the probability that outside gas enters into in the molten tin bath 3 through the malleation environment of transition roller set, and then reach and reduce the probability that the lower surface of glass area 1 appears the adhesion thing because the molten tin in the molten tin bath 3 is by the oxidation and leads to.

In this embodiment, the blowing direction of the upward blowing of the anti-oxidation air curtain at the exhaust port of the first lower air curtain exhaust nozzle 208 is inclined towards the direction of the transition roller set, and an included angle of 1-30 degrees is formed with respect to the vertical plane. Specifically, the included angle may be 1 °, 2 °, 3 °, 4 °, 5 °, 6 °, 7 °, 8 °, 9 °, 10 °, 11 °, 12 °, 13 °, 14 °, 15 °, 16 °, 17 °, 18 °, 19 °, 20 °, 21 °, 22 °, 23 °, 24 °, 25 °, 26 °, 27 °, 28 °, 29 °, 30 °.

In this way, the blowing direction of the upward blowing anti-oxidation air curtain of the exhaust port of the first lower air curtain exhaust nozzle 208 is at an included angle of 1-30 degrees relative to the vertical plane towards the inclined direction of the transition roller set direction, so that positive pressure can be better formed in the transition roller set area. The anti-oxidation gas can be sprayed to the surface of the glass ribbon 5 by spraying the anti-oxidation gas curtain to the transition roller group, so that the effect of cooling and quickly hardening the lower surface of the glass ribbon 5 is achieved. That is, the exhaust port of the first lower air curtain exhaust nozzle 208 is disposed below the gap region between the tin bath outlet 31 and the transition roller set, and can also be directly disposed below the gap region between the transition roller set, so as to blow the anti-oxidation gas to the transition roller set, and achieve better technical effects. However, this arrangement is not preferable because it may blow impurities or dirt on the transition roller group onto the surface of the glass ribbon 5.

In the present embodiment, a first lower gas heating device 213 is disposed on a communication passage between the first lower oxidation prevention gas supply device and the first lower curtain gas discharge nozzle 208.

Like this, through setting up first gas heating device, utilize first gas heating device can be more accurate control to spout the temperature of the anti-oxidant gas that blows out to more accurate control carries out refrigerated temperature to glass area 1 lower surface, and then reaches the purpose of avoiding appearing the roll mark.

In this embodiment, a first lower gas flow control valve 211 is further disposed on a communication channel between the first lower oxidation prevention gas supply device and the first lower curtain gas discharging nozzle 208.

Thus, the first lower gas flow control valve 211 is used for more accurately controlling the flow of the injected anti-oxidation gas, and the cooling temperature of the lower surface of the glass ribbon 1 can be more accurately controlled by the matched control of the flow and the temperature of the anti-oxidation gas, so that the hardening effect of the lower surface of the glass ribbon 1 is ensured, and the occurrence of roll marks is avoided.

In the present embodiment, a second lower air curtain device for blowing an oxidation-proof air curtain upward from below the gap region between the transition roller group and the annealing roller 204 in the annealing lehr 4 is further included.

Like this, through setting up the air curtain device under the second, utilize the air curtain device under the second to spout anti-oxidation gas and form anti-oxidation air curtain in the regional direction down in clearance between transition roller set and the annealing kiln 4, this anti-oxidation air curtain can realize blocking effect to the position between transition roller set and the annealing kiln 4, make the gas that flows from annealing kiln 4 department can't enter into the transition roller set region from the below of glass area 1 in, also can't further enter into molten tin bath 3 naturally, anti-oxidation air curtain that air curtain device formed under the second and anti-oxidation air curtain that first air curtain device formed cooperate from this, form relatively independent malleation environment in transition roller set region, with this purpose that reaches further preventing that the external gas from entering into molten tin bath 3.

In this embodiment, the second lower curtain device comprises a second lower anti-oxidation gas supply device and a second lower curtain gas discharge nozzle 209 communicated with the second lower anti-oxidation gas supply device and arranged below the gap area between the transition roller group and the annealing roller 204; the exhaust of the second lower curtain exhaust nozzle 209 is directed upward toward the nip region between the set of transition rolls and the annealing roll 204.

In this way, the second lower anti-oxidation gas supply means is used to supply anti-oxidation gas, and the anti-oxidation gas is ejected upward from the second lower curtain gas ejection nozzles 209 to form an anti-oxidation gas curtain below the region between the transition roller group and the annealing rollers 204.

In this embodiment, the exhaust port of the second lower curtain exhaust nozzle 209 has a flat belt shape, and the belt-shaped extension direction of the flat belt-shaped exhaust port is parallel to the extension direction of the gap region between the transition roller group and the annealing roller 204.

Thus, the anti-oxidation gas discharged from the second lower gas curtain vent nozzle 209 can be discharged more uniformly from the flat strip-shaped vent port, and at the same time, because the strip-shaped extending direction of the flat strip-shaped vent port is parallel to the extending direction of the gap area between the transition roller group and the annealing roller 204, the anti-oxidation gas curtain formed by the anti-oxidation gas discharged from the flat strip-shaped vent port is parallel to the extending direction of the gap area between the transition roller group and the annealing roller 204, so that the anti-oxidation gas curtain can block the external gas in the extending direction of the transition roller group, and the anti-oxidation gas curtain formed by the second lower gas curtain vent nozzle 209 and the anti-oxidation gas curtain formed by the first lower gas curtain vent nozzle 208 are matched to further ensure the gas blocking effect on the position of the tin bath outlet 31 below the glass ribbon 1.

In this embodiment, the exhaust port of the second lower curtain exhaust nozzle 209 is a plurality of second lower exhaust holes 218 arranged in parallel, and the arrangement extending direction of the plurality of second lower exhaust holes 218 is parallel to the extending direction of the gap region between the transition roller group and the annealing roller 204.

Thus, by arranging the second lower exhaust holes 218, the anti-oxidation gas is uniformly discharged upwards from the second lower exhaust holes 218 to form an upward anti-oxidation gas curtain, the arrangement of the second lower exhaust holes 218 can reduce the waste of the anti-oxidation gas on the premise of ensuring the formation of the anti-oxidation gas curtain, meanwhile, the arrangement and extension direction of the second lower exhaust holes 218 is parallel to the extension direction of the gap area between the transition roller group and the annealing roller 204, so that the anti-oxidation gas curtain formed by the anti-oxidation gas discharged through the second lower exhaust holes 218 is also parallel to the extension direction of the gap area between the transition roller group and the annealing roller 204, and the anti-oxidation gas curtain can block the external gas at the position of the transition roller group in the extension direction of the transition roller group, and the anti-oxidation gas curtain formed by the second lower gas curtain exhaust nozzle 209 is matched with the anti-oxidation gas curtain formed by the first lower gas curtain exhaust nozzle 208, further ensuring the gas blocking action at the location of the tin bath outlet 31 below the glass ribbon 1.

In this embodiment, the blowing direction of the second lower air curtain exhaust nozzle 209 blowing the oxidation-preventing air curtain upward is inclined toward the transition roller group.

Like this, the jetting direction of the upwards jetting of anti-oxidation air curtain of gas curtain air discharge nozzle 209 inclines towards transition roller set direction under the second can make more anti-oxidation gas incline towards the direction of transition roller set to better form the malleation in transition roller set region, further reduce the external gas and enter into the probability in the molten tin bath 3 through the malleation environment of transition roller set, and then reach and reduce the probability that the lower surface of glass area 1 leads to because the molten tin in the molten tin bath 3 is by the oxidation adhesion thing that appears.

In this embodiment, the blowing direction of the second lower air curtain exhaust nozzle 209 blowing the anti-oxidation air curtain upwards is inclined towards the direction of the transition roller set, and an included angle of 1-30 degrees is formed relative to the vertical plane. Specifically, the included angle may be 1 °, 2 °, 3 °, 4 °, 5 °, 6 °, 7 °, 8 °, 9 °, 10 °, 11 °, 12 °, 13 °, 14 °, 15 °, 16 °, 17 °, 18 °, 19 °, 20 °, 21 °, 22 °, 23 °, 24 °, 25 °, 26 °, 27 °, 28 °, 29 °, 30 °.

In this way, the blowing direction of the upward blowing anti-oxidation air curtain of the exhaust port of the second lower air curtain exhaust nozzle 209 forms an included angle of 1-30 degrees relative to the vertical plane towards the inclined direction of the transition roller set direction, so that positive pressure can be better formed in the transition roller set area. The anti-oxidation gas can be sprayed to the surface of the glass ribbon 5 by spraying the anti-oxidation gas curtain to the transition roller group, so that the effect of cooling and quickly hardening the lower surface of the glass ribbon 5 is achieved. That is to say, the exhaust port of the second lower air curtain exhaust nozzle 209 is disposed below the gap region between the transition roller set and the annealing roller 204 in the annealing kiln 4, and can also be directly disposed below the gap region between the transition roller set to blow the anti-oxidation gas to the transition roller set, so as to achieve better technical effect. However, this arrangement is not preferable because it may blow impurities or dirt on the transition roller group onto the surface of the glass ribbon 5.

In this embodiment, a second lower gas heating device is disposed on a communication passage between the second lower oxidation prevention gas supply device and the second lower curtain gas discharge nozzle 209.

In this way, by arranging the second lower gas heating device, the temperature of the anti-oxidation gas blown out by the spraying can be more accurately controlled by using the second lower gas heating device, so that the temperature of the lower surface of the glass entering the annealing kiln 4 can be more accurately controlled to meet the relevant technological requirements.

In this embodiment, a second lower gas flow control valve 215 is further disposed on the communication channel between the second lower anti-oxidation gas supply device and the second lower curtain gas exhaust nozzle 209.

Thus, the second lower gas flow control valve 215 is used for more accurately controlling the flow of the injected anti-oxidation gas, and the temperature of the lower surface of the glass entering the annealing furnace 4 is more accurately controlled by the matching control of the flow and the temperature of the anti-oxidation gas, so as to meet the relevant technological requirements.

In this embodiment, a first lower partition plate 206 is further included which is arranged in the gap area between the transition roller group and the annealing rollers 204 in the annealing lehr 4 and is liftable, and the first lower partition plate 206 is disposed at a distance from the glass ribbon 1.

Like this, through setting up first partition panel 206 down, and with first partition panel 206 and the relative setting of glass area, and simultaneously, during the in-service use, can set up first partition panel 206 to the structure of liftable (the structure of the lift in this embodiment can adopt the lead screw nut mechanism among the prior art, elevating function is realized to rack and pinion mechanism etc. concrete structural style can be selected as required), make the last border that guarantees under the prerequisite that the glass area passes through smoothly reduce first partition panel as far as with the distance that corresponds position glass area 1, can further realize from the gaseous effect of blocking of annealing kiln department from this.

In this embodiment, a second lower partition plate 207 capable of ascending and descending is arranged below each transition roller in the transition roller group, so that the lower partition area below the transition roller group is divided into a plurality of lower partition areas.

In this way, by providing the second lower partition plate 207, the transition roller group can be partitioned into a plurality of lower partition regions, so that each lower partition region becomes a relatively independent space, thereby further improving the sealing and blocking effect of the outside air below the transition roller group.

In the present embodiment, a lower exhaust nozzle 220 for outputting the oxidation-preventing gas is also arranged in each lower partition region.

Thus, the lower air exhaust nozzles 220 output anti-oxidation gas, on one hand, the formed anti-oxidation gas curtain can form positive pressure in the lower space of the transition roller set, and thus a protective environment for preventing tin defects is established; meanwhile, the protective film can be formed on the lower surface of the glass plate by controlling the components of the anti-oxidation gas, so that the lower surface of the glass is protected from being scratched easily.

In this embodiment, a lower heating device 216 is also disposed within each lower partition area. Specifically, the lower heating device may employ a thermocouple.

In this way, the lower heating device 216 can be used to more precisely control the temperature of different regions of the lower surface of the glass ribbon 1 passing through the set of transition rolls, thereby better meeting the requirements of the process.

In the present embodiment, a temperature detection device 205 for detecting the temperature of the lower region of the transition roller group is further provided below the gap between the transition roller group and the annealing rollers 204 of the annealing lehr 4.

In this way, the temperature detection device 205 is used for detecting the temperature of the lower region of the transition roller table, so as to better realize the temperature control under the transition roller table.

In this embodiment, the lower gas heating device and/or the lower gas flow control valve adjusts the temperature and/or the flow rate of the gas ejected from the lower curtain nozzle according to the temperature detected by the temperature detecting device 205.

In this way, the lower gas heating device and/or the lower gas flow control valve can adjust the temperature and/or the flow of the gas ejected from the lower gas curtain exhaust nozzle according to the temperature detected by the temperature detection device 205, so that the temperature of the lower area of the transition roller set can be kept in a proper temperature range.

Specifically, the first lower anti-oxidation gas supply device comprises a first lower gas supply pipeline, the second lower anti-oxidation gas supply device comprises a second lower gas supply pipeline and a third lower gas supply pipeline, the first lower gas supply duct is provided with a first gas mixing device 210, the first gas mixing device 210 is also simultaneously communicated with a third lower gas supply duct, so that the gas of the first lower gas supply duct and the gas of the third lower gas supply duct are mixed in the first gas mixing device 210 and then delivered to the first lower curtain gas discharge nozzle 208 to be sprayed out, a first lower gas flow control valve 211 is further arranged on the first lower gas supply pipeline, and a third lower gas flow control valve 212 and a lower gas heating device 213 are further arranged on the third lower gas supply pipeline (wherein, the first lower gas heating device and the second lower gas heating device are used together, and the lower gas heating devices are adopted to realize the heating effect); and a second gas mixing device 214 is arranged on the second lower gas supply pipeline, the second gas mixing device 214 is also communicated with the third lower gas supply pipeline simultaneously, so that the gas of the third lower gas supply pipeline and the gas of the second lower gas supply pipeline are mixed in the second gas mixing device 214 and then are conveyed to the second lower gas curtain exhaust nozzle 209 to be sprayed out, and a second lower gas flow control valve 215 is also arranged on the second lower gas supply pipeline. Because the glass area of different materials can adopt different anti-oxidizing gas when carrying out the roller lower isolation protection of transition roller platform to it, through air supply duct under first air supply duct and second under the basis of additional setting up the third for can carry out more effectual control to the anti-oxidizing gas of supply according to actual conditions, with the user demand who satisfies different material glass areas.

Specifically, the first lower air curtain vent nozzle 208 is mounted through a first detachable lower mounting bracket, so that the first lower air curtain vent nozzle 208 can be conveniently mounted and dismounted, and the first lower mounting bracket can be made of a steel plate material to adapt to a high-temperature working environment.

Specifically, the second lower air curtain air discharge nozzle 209 is mounted through a detachable second lower mounting bracket, so that the second lower air curtain air discharge nozzle 209 can be conveniently mounted and dismounted, and the second lower mounting bracket can be made of steel plate materials to adapt to the high-temperature working environment.

In this embodiment, the oxidation preventing gas is a reducing gas, and one or more of nitrogen, nitrogen monoxide, sulfur dioxide, carbon monoxide, and carbon dioxide may be used.

Thus, the choice of the anti-oxidizing gas can be selected based on a combination of different and cost aspects of producing the glass.

When glass is produced, the possibility that the surface of the glass contains devitrification and the plate breaking accident occurs at the outlet of the tin bath exists, when the plate breaking accident is processed, more cullet falls in the lower device 2 of the transition roller table and must be cleaned, and therefore, a sliding mounting plate is arranged in the lower area of the transition roller set to provide an easy-to-clean solution. The sliding installation plate is installed on the roller table of the transition roller group and can slide relative to the horizontal direction of the transition roller group, and the lower heating device, the first lower air curtain device and the second lower air curtain device are all installed on the sliding installation plate. The sliding mounting plate is pulled to drive the first lower air curtain device and the second lower air curtain device to horizontally move relative to the transition roller group. A plurality of sliding mounting plates can also be arranged, and the lower heating device and the first lower air curtain device and the second lower air curtain device are correspondingly arranged on the sliding mounting plates. During cleaning, the lifting mechanisms are utilized to rapidly lift up the check curtains, the glass belt 5 is smoothly drawn into the annealing furnace 4 through the transition roller group, and then the check curtains are recovered to be lowered. Utilize the hook to hook out cullet, recycle the cullet in negative pressure adsorption equipment clearance sliding mounting panel and the roller platform, will lower heating device, first air curtain device and second air curtain device reset again, transition roller platform lower part device 2 is cleared up soon and is resumeed, each item function resumes rapidly, and the face quality also can resume soon. The embodiment can quickly recover the influence generated by the plate breaking accident of the tin bath, and has remarkable effects on preventing the tin defect and eliminating the roll mark and the adhered substances. Meanwhile, when the part is required to be cleaned, the corresponding device is removed to clean and adsorb the steel plate, namely the roller table is convenient to clean and operate, and the roller table is beneficial to keeping clean.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all that should be covered by the claims of the present invention.

Claims (10)

1. The under-roller isolation protection device for the float glass transition roller table is characterized by comprising a mounting seat fixedly arranged below a transition roller set of the float glass transition roller table, wherein a lower air curtain exhaust nozzle is fixedly arranged on the mounting seat, and an exhaust port of the lower air curtain exhaust nozzle upwards faces to a gap area between a tin bath outlet and the transition roller set and/or a gap area between the transition roller set and an annealing roller in an annealing kiln; the first lower anti-oxidation gas supply device is communicated with the lower gas curtain exhaust nozzle and is used for supplying anti-oxidation gas.

2. The under-roll insulation protection device for a float glass transition roll stand according to claim 1, wherein the exhaust port of the lower air curtain exhaust nozzle is in a flat belt shape, and the belt-shaped extension direction of the exhaust port of the flat belt shape is parallel to the extension direction of the gap region between the tin bath outlet and the transition roll set and/or the gap region between the transition roll set and the annealing roll in the annealing furnace; or the exhaust port of the lower air curtain exhaust nozzle is a plurality of lower exhaust holes which are arranged in parallel, and the arrangement extending direction of the lower exhaust holes is parallel to the extending direction of a gap area between the tin bath outlet and the transition roller group and/or a gap area between the transition roller group and an annealing roller in the annealing kiln.

3. The under-roll isolation protection device for a float glass transition roll table according to claim 1, wherein the blowing direction of the upward blowing anti-oxidation air curtain of the exhaust port of the lower air curtain exhaust nozzle is inclined toward the transition roll set, and the inclination direction forms an included angle of 1 to 30 ° with respect to a vertical plane.

4. The under-roll isolation protection device for a float glass transition roll stand according to claim 1, wherein a lower gas heating device and/or a lower gas flow control valve is disposed on a communication passage between the lower oxidation-preventing gas supply device and the lower gas curtain air discharge nozzle.

5. The under-roll insulation protection device for a float glass transition roll stand of claim 1, further comprising a first lower partition panel disposed in a gap area between the transition roll set and an annealing roll in the annealing lehr, and the first lower partition panel is disposed opposite to and spaced apart from the glass ribbon.

6. The under roll insulation protection device for a float glass transition roll table according to claim 1, wherein a second lower partition plate is provided below each transition roll in the transition roll group so that the below of the transition roll group is partitioned into a plurality of lower partition regions.

7. The under roll isolation protector for a float glass transition roll stand of claim 6, wherein a lower exhaust nozzle for outputting an anti-oxidizing gas is further disposed in each lower exclusion region.

8. The under roll insulation protection device for a float glass transition roll stand of claim 6, further comprising a lower heating device disposed in each lower blocking area.

9. The under-roller insulation protection device for a float glass transition roller table according to claim 1, wherein a temperature detection device for detecting a temperature of a lower region of the transition roller group is further provided below a gap between the transition roller group and an annealing roller of the annealing lehr.

10. The under roll insulation protection device for a float glass transition roll stand according to any one of claims 1 to 9, wherein the transition roll group comprises a first transition roll, a second transition roll and a third transition roll which are provided along a moving direction of a glass ribbon and can be independently lifted and/or controlled in rotation speed.

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